Aquamarine Aquamarines vary in color from deep blue to blue-green of different intensities, caused by traces of iron in the beryl crystal. Naturally occurring deep blue stones are the most prized because they are rare and expensive. However, yellow beryl stones can be heated to change them to blue aquamarines. The aquamarine – also called … Continue reading Happy Birthday to all you March babies. Your month has 2 birthstones – the aquamarine and the bloodstone.